SALES SHEET LP FlameBlock Fire-Rated OSB Sheathing Application: Multifamily roof decks fire wall continuity Where the shared, or common wall separating occupancies meets a roof deck, code* requires either a) extension of the firewall 30 beyond the roof vertically (parapet construction) b) Use of Class A flame spread rated sheathing for 4 on each side of the wall where it intersects the roof deck c) Type X gypsum wallboard installed underneath roof deck 4 on each side of fire wall. LP Certification/Listing: ICC-ESR #1365 FlameBlock (white, coated face down) FRT plywood Type X Gypsum wall board LP FlameBlock sheathing is a direct substitution with Pyrotite facing down Application: 1-hour rated exterior fire wall zero lot line applications 2009 IRC requires walls built within 5 of a property line or within 5 of another building on the same property to have a 1 hour fire resistance rating with fire exposure from the exterior of the building (NOTE: Code* requirements vary) An addendum to the assembly allows for the use of common claddings, including SmartSide, fiber cement, and T1-11 panels. Assembly is listed with Intertek, not UL (See below) This assembly is load restricted. An engineering evaluation will be required to insure that various compressive, axial, and shear strength requirements are met LP Certification/Listing: Intertek Labs - BT 60-01 5/8-inch exterior gypsum (such as GP Densglass) installed behind the exterior cladding Three-coat stucco Fiber cement board cladding installed over 5/8 Type X gypsum wallboard 1. FlameBlock with Pyrotite facing out 2. Mineral wool insulation 3. 5/8 Type X gypsum 4. 2 x 6 wood stud LP FlameBlock should be installed with Pyrotite facing the exterior cladding. *Code specifications and requirements vary. Always secure local building inspector approval of product use. Page 1 of 5 9/10
Application: 2-hour interior party wall common wall in townhome construction Double-stud party wall dividing units within a single building Structural/shear-rated wall LP Certification/Listing: Underwriters Labs U350 Two layers of 1 thick x 24 wide Shaft wall liner fire-rated gypsum with metal H-studs, installed between the two stud walls Typically, one side is built, then shaftliner is installed, then other wall is tilted up into position 1. 5/8 Type X gypsum 2. Mineral wool insulation 3. LP FlameBlock with Pyrotite facing living space 4. 2-2 x 4 wood studs LP wall assembly for this application requires 2 2x4 wood studs at least 1 apart, 1 layer of 15/32 LP FlameBlock sheathing & 1 layer of 5/8 Type X gypsum with mineral wool insulation in both stud cavities and Pyrotite facing the living space (See assembly for details) Application: 2-hour rated exterior wall Type IIIA Construction Designed to be used in commercial or multifamily residential buildings of 3-6 stories (Type IIIA) Type IIIA construction is required to have non-combustible exterior walls (no wood) that have been rated, under load, to last at least 2-hours in a fire with exposure on the inside wall surface FRT wood framing is allowed as an exception within the IBC Code* Structural/shear-rated wall with interior fire exposure rating LP wall assembly for this application has been allowed by building code officials* LP Certification/Listing: Underwriters Labs U349 Two layers of 5/8-inch, fire-rated gypsum on the interior with steel framing or FRT wood framing, FRT plywood exterior sheathing, and 5/8-inch exterior, fire-rated gypsum (such as GP DensGlass) (See U371) 1. Exterior facings 2. 1 layer 2-sided LP FlameBlock 3. Mineral wool insulation 4. 5/8 Type X gypsum 5. 5/8 Type X gypsum 6. 2 x 4 wood stud LP FlameBlock Sheathing Applications: LP wall assembly requires 2x4 wood studs,1 layer of 2-sided 15/32 LP FlameBlock sheathing & 2 layers of 5/8 Type X gypsum with mineral wool insulation on the interior side of the wall *Code specifications and requirements vary. Always secure local building inspector approval of product use. Page 2 of 5 9/10
Application: Type I and II roof decks strip malls and small commercial FRT is typically used as the roof deck, usually over foam insulation, as the walkable surface underneath rubber membranes EPDM and TPO single-ply membranes glued directly to the FRT plywood ICC-ES Report #1365 requires that the LP FlameBlock sheathing be treated both-sides to be considered equivalent to FRT in this application LP Certification/Listing: Underwriters Labs TGFU R21591 Common Application: FRT Plywood 2-sided LP FlameBlock sheathing Application: Open soffit exposures FlameBlock has been approved by California s Office of the State Fire Marshall s (OSFM) and will soon be added to their Approved Products list. Product is currently on the list as a soffit and limited ignition material under the Blazeguard name In an open soffit application, California code* allows LP FlameBlock sheathing to be used as the roof deck material over the roof rafter tails, Pyrotite facing down The warranty period for this application is currently 2 years. We are conducting testing to support extension of the warranty LP Certification/Listing: California OSFM Approved Product List Common Application Approved, ignition-resistant materials, such as fiber cement, installed as the ceiling of the open eaves LP FlameBlock sheathing with Pyrotite facing down *Code specifications and requirements vary. Always secure local building inspector approval of product use. Page 3 of 5 9/10
Application: WUI Zone exterior wall In high risk fire zones in California, exterior walls that are not otherwise required to be 1-hour rated must meet requirements for fire resistance LP FlameBlock sheathing has been evaluated to be used with the following architectural claddings: 1. LP SmartSide Lap and Panel Siding 2. 1/2 Cedar or Redwood Other claddings may be substituted with local building inspector approval LP Certification/Listing: California OSFM Approved Product List and Cal WUI protocol 12-7A-1 Common Practice: Fiber cement board claddings LP FlameBlock sheathing with Pyrotite facing out Application: Wood framed, low-slope commercial roof decks (Type V) In some places, commercial roof decks (like warehouse space) are constructed with wood frames If the roof deck is wood framed, FRT plywood is allowed as the roof deck LP FlameBlock sheathing may be used as a substitute for FRT plywood in these applications Please ask for assistance if you have this type of application LP Certification/Listing: UNDERWRITERS LABS TGFU R21591 Common Practice: FRT Plywood Depending on the building design type and location, one or two-sided LP FlameBlock sheathing may be required and Pyrotite treated single side may be required to face up or down *Code specifications and requirements vary. Always secure local building inspector approval of product use. Page 4 of 5 9/10
Application: Covered and boxed-in soffit Western US building design often prefers to leave the soffit area open, but to cover the roof deck exposed between the rafter tails with a decorative wood material Or builders may prefer to box-in the underside of the rafter tails by attaching a decorative cladding to the underside of the rafters In either of these cases, if the exposed, decorative material (the soffit ceiling ) is not on the OSFM s list of approved products for this application, the entire design must meet the performance requirements of a test specifically designed for this application: California SFM Standard 12-7A-3 LP FlameBlock sheathing has passed the requirements for SFM Standard 12-7A-3 utilizing 5/8 cedar as a decorative cladding. The fire test was constructed to present a worst case scenario and therefore cover any commercially available cedar or redwood cladding LP Certification/Listing: LP 12-7a-3 Test Report from Western Fire Center Picture from Western Fire Test Report Common Application: Approved, ignition-resistant materials, such as fiber cement, as the soffit ceiling, sometimes with firerated gypsum behind it LP FlameBlock sheathing with Pyrotite facing down *Code specifications and requirements vary. Always secure local building inspector approval of product use. Page 5 of 5 9/10 2010 Louisiana-Pacific Corporation. PRYOTITE is a registered trademark of Barrier Technology Corp. LP, FLAMEBLOCK, and BUILD WITH US. are registered trademarks of Louisiana-Pacific Corporation. All rights reserved. Printed in USA.